Today I want to describe how you can send some data to web-server
from your remote script using TWebBrowser component.

var
strData: string;
PostData: OleVariant;
Headers: OleVariant;
i: Integer;
begin
{1. you must create a string with parameter names and values
Result string must be in the next format:
Param1=Value1&Param2=Value2&Param3=Value3...}
strData := 'Param1Name=' + HTTPEncode(Param1Value) + '&' +
'Param2Name=' + HttpEncode(Param2Value) + ...;
{2. you must convert a string into variant array of bytes and
every character from string is a value in array}
PostData := VarArrayCreate([0, Length(strData) - 1], varByte);
{ copy the ordinal value of the character into the PostData array}
for i := 1 to Length(strData) do
PostData[i-1] := Ord(strData[i]);
{3. prepare headers which will be sent to remote web-server}
Headers := 'Content-Type: application/x-www-form-urlencoded' + #10#13;
{4. you must navigate to the URL with your script and send as parameters
your array with POST-data and headers}
yourWebBrowserComponent.Navigate('http://www.yourdomain.com/your_post_script.asp', EmptyParam, EmptyParam, PostData, Headers);
end;

Of course, the same task can be solved with any internet
component which implement the http-client (not only TWebBrowser).
But for every component the data for script will be posted by own
rules (most components have pre-defined properties for this task).

For example, you can use my TSMIHTTPClient component from SMInternet suite.
There you must set Action=haPost and fill the Headers property
with own Post-data.